EP1338845B1 - Lamp - Google Patents
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- Publication number
- EP1338845B1 EP1338845B1 EP03007163A EP03007163A EP1338845B1 EP 1338845 B1 EP1338845 B1 EP 1338845B1 EP 03007163 A EP03007163 A EP 03007163A EP 03007163 A EP03007163 A EP 03007163A EP 1338845 B1 EP1338845 B1 EP 1338845B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical element
- lamp
- reflector
- microprisms
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/0008—Reflectors for light sources providing for indirect lighting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2113/00—Combination of light sources
Definitions
- the present invention relates to a luminaire with a reflector and two optical elements with a microprism structure for limiting the exit angle of the light beams from the luminaire according to the preamble of patent claim 1.
- optical elements of the above type is to be achieved that the exit angle of light rays from the lamp is limited, i. is less than a predetermined threshold exit angle to reduce glare to the viewer.
- such an optical element also causes mechanical protection of the lamp and in particular of the lamp inside the lamp.
- Such an optical element is for example from the Austrian patent AT-B-403,403 known.
- the known optical element on its lamp side facing the lamp in rows and rows arranged pyramidal profiles 2, so-called microprisms, which are formed as a truncated pyramid starting from a plate-shaped core 3 and a parallel to the base surface (light exit surface) of the core 3 lying upper boundary surface (light entrance surface) have.
- the entire optical element 1 consists entirely of a transparent or transparent material.
- the known luminaire 4 has a lamp 5, such as a fluorescent tube or the like, a reflector housing 6 surrounding the lamp 5 and an optical element 1.
- the optical element 1 also consists of a plate-shaped core 3 of transparent material, which is occupied on one side with microprisms 2, which taper to form furrows 7 - starting from its root, wherein the entirety of the micro-prism cover surfaces, the light entry surface. 8 forms.
- lenses 9 are provided on the other side of the core 3, which forms the light exit surface.
- a luminaire with a lamp, a reflector surrounding the lamp and an optical element of the type described above arranged in the emission direction in front of the lamp is known, for example, from US Pat EP 0 911 577 A2 known.
- the JP-A-10 106319 describes a similar luminaire in which two optical elements are arranged one behind the other in the emission direction, the microprism structures of these optical elements being aligned parallel to one another.
- the WO 96/10148 again shows an arrangement in which two optical elements are arranged one behind the other, wherein the micro-prism structure of the one optical element is aligned transversely to the micro-prism structure of the other optical element.
- the American Patent US 5,863,114 on the other hand shows a light-emitting panel unit with a light source and a prism plate.
- the use of the correspondingly designed optical element ensures glare-free illumination for the viewer, the brightness distribution of the light via the optical element is not uniform, since more light beams are coupled into the optical element in the vicinity of the lamp than, for example in the edge regions of the optical element.
- the lamp is not directly visible through the optical element, but due to the greater brightness, its position can at least be guessed by the viewer.
- the WO 95/12782 In order to achieve a uniform light emission of the lighting arrangement, it is for example from the WO 95/12782 known to couple light from a lamp laterally in a light guide, which transports the light mainly parallel to its light exit surface. On the light exit surface of the light-guiding element, a micro-prism structure is attached, which on the one hand enables decoupling of the light from the light guide and, on the other hand, limits the exit angle of the illumination arrangement. It should be noted, however, that in the WO 95/12782 described backlight lighting for displays or other displays and for room lighting is only partially suitable.
- the luminaire according to the invention has a total of two optical elements, which have the same structure and whose microprisms each have an elongated structure, at least one lamp and a reflector.
- the second optical element is arranged parallel to the first optical element, wherein the microprisms of the second optical element extend transversely to the microprisms of the first optical element, i. the two optical elements with respect to the extension direction of their microprisms are rotated against each other by 90 °.
- two elongated and mutually parallel lamps are provided which are arranged laterally offset outwards relative to the emission opening, wherein the reflector is arranged and shaped with respect to the lamps such that essentially only light beams reflected at the reflector leave the emission opening through the optical elements can.
- Fig. 5 an embodiment of the luminaire according to the invention is shown schematically.
- the optical elements used in these luminaires are in Fig. 4 shown.
- the first embodiment according to Fig. 3 which is not the subject of the claims, shows a luminaire 10 with two elongated lamps 11, such as fluorescent tubes.
- the lamps 11 are enclosed by a corresponding reflector 12, which has an emission opening 13 on its underside.
- the reflector 12 may either serve itself as a housing of the luminaire or be arranged and fixed in a corresponding (not shown) luminaire housing.
- an optical element 14 is used, which essentially corresponds to the in Fig. 1 corresponds to the known element shown.
- the optical element 14 arranged in or in front of the emission opening 13 serves for the deflection of light rays 15 entering and exiting therefrom, such that their exit angle is limited, ie smaller than a predetermined limit exit angle of approximately 60-70 °.
- the optical element 14 a plate-shaped core 16 of transparent material, such as acrylic glass, which is occupied on one side with microprisms 17, which tapers to form furrows 18 - starting from its root, the entirety of Micro-prism cover surfaces, the light entrance surface and the other side of the core 17 forms the light exit surface.
- the microprisms 17 are arranged like a matrix in rows and rows (cross structure).
- the optical element 12 conversely in the luminaire 10.
- the entirety of the microprism cover surfaces forms the light exit surface and the other side of the core 17 forms the light entry surface.
- the lamps 11 are arranged laterally offset from the emission opening 13 or the optical element 14. Further, the reflector 12 is arranged and shaped with respect to the lamps 11 so that the light beams 15 radiated from the lamps 11 can not be emitted directly through the emission opening 13, ie substantially only at the reflector 12 reflected light rays 15 can leave the emission opening 13 through the optical element 14.
- the inside of the reflector 12 is formed diffusely reflective, such as painted white or coated with highly reflective Teflon.
- the construction of the microprismatic 17 optical element 14, in a known manner, provides glare control of the light rays to the viewer, i. A limitation of the exit angle of the light rays 15 from the lamp 10. Due to the fact that no or almost no light beams are emitted directly from the lamps 11 through the optical element 14, but substantially only on the inside of the reflector 12 reflected light beams 15 in the optical element 14 einkoppeln and leave this down again, one reaches a uniform or at least almost uniform illumination of the entire surface of the optical element 14. This effect is further enhanced by a diffusely reflecting inside of the reflector.
- the second embodiment differs from the first embodiment in that a total of two optical elements 14-1 and 14-2 are arranged in or in front of the emission opening 13 of the reflector 12. Moreover, the structure of the lamp 10, ie in particular the arrangement of the lamps 11 and the reflector 12, that of the first embodiment.
- both optical elements 14-1, 14-2 of the luminaire 10 are according to Fig. 4 built up.
- the microprisms 17 of this embodiment have an elongated structure.
- the microprisms extend in an extending direction of the optical element over the substantially entire length of the optical element 10 (longitudinal structure) while being arranged consecutively in the other direction.
- a transverse suppression perpendicular to the extension direction of the microprisms 17 is achieved.
- the extension direction of the microprisms 17 of the one optical element 14-1 being rotated by 90 ° with respect to the extension direction of the microprisms 17 of the other optical element 14-2 is, ie the microprisms of the first optical element 14-1 extend transversely to the microprisms of the second optical element 14-2, the same effect is achieved as with a single cross-sectional optical element 14.
- the production of the optical elements 14-1, 14-2 with a longitudinal structure is simpler and thus less expensive than the production of the optical elements 14 with a cross-shaped structure.
- Fig. 5 is the first optical element 14-1 arranged such that the elongated microprisms 17 is aligned parallel to the longitudinal axis of the lamps 11, while the extension direction of the microprisms 17 of the second optical element 14-2 transverse to the longitudinal axis of the lamps 11 extends.
- the optical elements 14-1 and 14-2 may also be mounted in reverse order in or in front of the emission aperture 13 of the reflector 12, without this having any influence on the optical properties of the entire assembly.
- the spaces 18 between the adjacent microprisms 17 are preferably covered with a reflective material 19, such as a high reflectivity metal foil. This ensures that only the light which strikes from the lamps 11 via the reflector 12 to the top surfaces of the microprisms 17 forming the light entry surface is emitted by the optical element 14-1, 14-2. The incident on the cover 19 light rays are reflected back into the interior of the lamp 10 and reflected back from the inside of the reflector 12 in the direction of the optical element 14-1, 14-2.
- a reflective material 19 such as a high reflectivity metal foil.
- the efficiency of the optical element 14-1, 14-2 can be further increased.
- optical element 14-1, 14-2 of Fig. 4 These measures can, of course, in all other embodiments of the lamp, in particular in the embodiments of Fig. 3 and 6 , be applied in an analogous manner.
- the reflector 12 has on its underside an emission opening 13, which is closed by an optical element 14-1.
- the optical element 14-1 corresponds to that in FIG Fig. 4 Thus, in particular, it has a longitudinal structure of the microprisms 17.
- the optical element 14-1 is, as in FIG Fig. 6 shown oriented in such a way that the microprisms 17 extend transversely to the longitudinal axis of the lamp 11.
- the inside of the reflector 12 is designed to be reflective and the lamp 11 is not offset laterally but is arranged centrally above the optical element 14-1. Nevertheless, even in this case, uniform illumination of the optical element 14-1 and glare reduction of the light rays, i.
- the optical element 14-1 due to the longitudinal structure of the microprisms 17 transversely to the longitudinal axis of the lamp provides for a glare parallel to the longitudinal axis of the lamp, and a uniform illumination parallel to the longitudinal direction of the lamp is given automatically by the elongated shape of the lamp.
- the optical elements 14-1, 14-2 can also be arranged in or in front of the emission opening 13 of the luminaire 10 in the case of the luminaires 10 according to the second and third embodiments, so that either the entirety of the microprism cover surfaces occupy the light entry surface and the other side of the core forms the light exit side or vice versa.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Optical Elements Other Than Lenses (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Finger-Pressure Massage (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Leuchte mit einem Reflektor und zwei optischen Elementen mit Mikroprismenstruktur zur Begrenzung des Austrittswinkels der Lichtstrahlen aus der Leuchte nach dem Oberbegriff von Patentanspruch 1.The present invention relates to a luminaire with a reflector and two optical elements with a microprism structure for limiting the exit angle of the light beams from the luminaire according to the preamble of patent claim 1.
Durch optische Elemente der oben genannten Art soll erreicht werden, dass der Austrittswinkel von Lichtstrahlen aus der Leuchte begrenzt wird, d.h. kleiner als ein vorbestimmter Grenzaustrittswinkel ist, um eine Blendung für den Betrachter zu verringern. Darüber hinaus bewirkt ein solches optisches Element auch einen mechanischen Schutz der Leuchte und insbesondere der Lampe im Innern der Leuchte.By optical elements of the above type is to be achieved that the exit angle of light rays from the lamp is limited, i. is less than a predetermined threshold exit angle to reduce glare to the viewer. In addition, such an optical element also causes mechanical protection of the lamp and in particular of the lamp inside the lamp.
Ein solches optisches Element ist beispielsweise aus dem österreichischen Patent
Ein weiteres optisches Element der eingangs genannten Art ist beispielsweise in der
Eine Leuchte mit einer Lampe, einem die Lampe umgebenden Reflektor sowie einem in Abstrahlrichtung vor der Lampe angeordneten optischen Element der oben beschriebenen Art ist beispielsweise aus der
Bei den bekannten Leuchtensystemen ist zwar durch die Verwendung des entsprechend gestalteten optischen Elements eine Entblendung für den Betrachter gewährleistet, die Helligkeitsverteilung des Lichts über das optische Element ist jedoch nicht gleichmäßig, da in der Nähe der Lampe mehr Lichtstrahlen in das optische Element einkoppeln als zum Beispiel in den Randbereichen des optischen Elements. Die Lampe ist zwar durch das optische Element hindurch nicht direkt zu erkennen, aber aufgrund der größeren Helligkeit kann ihre Position vom Betrachter zumindest erahnt werden.In the known lighting systems, although the use of the correspondingly designed optical element ensures glare-free illumination for the viewer, the brightness distribution of the light via the optical element is not uniform, since more light beams are coupled into the optical element in the vicinity of the lamp than, for example in the edge regions of the optical element. Although the lamp is not directly visible through the optical element, but due to the greater brightness, its position can at least be guessed by the viewer.
Um eine gleichmäßige Lichtabstrahlung der Beleuchtungsanordnung zu erzielen, ist es beispielsweise aus der
Ausgehend von dem vorgenannten Stand der Technik ist es eine Aufgabe der vorliegenden Erfindung, eine Leuchte bereitzustellen, bei der der Austrittswinkel der Lichtstrahlen zum Zwecke der Entblendung begrenzt ist und gleichzeitig auf einfache Weise und insbesondere ohne die Verwendung eines Lichtleitelements eine möglichst gleichmäßige Abstrahlung des Lichts über die gesamte Fläche des optischen Elements erzielt wird.Based on the aforementioned prior art, it is an object of the present invention to provide a lamp in which the exit angle of the light beams is limited for the purpose of glare and at the same time in a simple manner and in particular without the use of a light guide uniform emission of light over the entire surface of the optical element is achieved.
Gemäß der vorliegenden Erfindung wird die oben genannte Aufgabe durch eine Leuchte mit den Merkmalen von Patentanspruch 1 gelöst.According to the present invention, the above object is achieved by a luminaire having the features of claim 1.
Die erfindungsgemäße Leuchte weist insgesamt zwei optische Elemente, die gleich aufgebaut sind und deren Mikroprismen jeweils eine längliche Struktur haben, wenigstens eine Lampe und einen Reflektor auf. Das zweite optische Element ist dabei parallel zu dem ersten optischen Element angeordnet, wobei die Mikroprismen des zweiten optischen Elements quer zu den Mikroprismen des ersten optischen Elements verlaufen, d.h. die beiden optischen Elemente bezüglich der Erstreckungsrichtung ihrer Mikroprismen gegeneinander um 90 DEG verdreht sind. Durch diesen Aufbau wird die gleiche Entblendungswirkung erzielt wie mit einem einzigen optischen Element, dessen Mikroprismen raster- bzw. matrixartig angeordnet sind, allerdings ist die Herstellung optischer Elemente mit Längsstruktur einfacher und damit auch kostengünstiger als die Herstellung von optischen Elementen mit Kreuzstruktur. Erfindungsgemäß sind zwei Längliche und parallel zueinander ausgerichtete Lampen vorgesehen, die seitlich nach außen versetzt zu der Abstrahlöffnung angeordnet sind, wobei der Reflektor so im Bezug auf die Lampen angeordnet und geformt ist dass im Wesentlichen nur am Reflektor reflektierte Lichtstrahlen die Abstrahlöffnung durch die optischen Elemente verlassen können.The luminaire according to the invention has a total of two optical elements, which have the same structure and whose microprisms each have an elongated structure, at least one lamp and a reflector. The second optical element is arranged parallel to the first optical element, wherein the microprisms of the second optical element extend transversely to the microprisms of the first optical element, i. the two optical elements with respect to the extension direction of their microprisms are rotated against each other by 90 °. By this construction, the same Entblendungswirkung is achieved as with a single optical element whose microprisms are arranged in a grid or matrix, however, the production of optical elements with a longitudinal structure is simpler and thus more cost-effective than the production of optical elements with cross structure. According to the invention, two elongated and mutually parallel lamps are provided which are arranged laterally offset outwards relative to the emission opening, wherein the reflector is arranged and shaped with respect to the lamps such that essentially only light beams reflected at the reflector leave the emission opening through the optical elements can.
Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der vorliegenden Erfindung sind Gegenstand der Unteransprüche.Further advantageous embodiments and modifications of the present invention are the subject of the dependent claims.
Die Erfindung wird nachfolgend anhand verschiedener bevorzugter Ausführungsbeispiele unter Bezugnahme auf die beiliegende Zeichnung näher beschrieben. Darin zeigen:
- Fig. 1
- ein bekanntes optisches Element in perspektivischer Darstellung aus Sicht der Lampe der Leuchte;
- Fig. 2
- eine bekannte Leuchtenanordnung im Schnitt;
- Fig. 3
- ein Ausführungsbeispiel einer Leuchte, die nicht Gegenstand des Ansprüche ist, in perspektivischer schematischer Darstellung aus Sicht des Betrachters;
- Fig. 4
- ein optisches Element in perspektivischer Darstellung aus Sicht der Lampe der Leuchte, welches in einer erfindungsgemäßen Leuchte einsetzbar ist;
- Fig. 5
- ein Ausführungsbeispiel der Leuchte gemäß der vorliegenden Erfindung in perspektivischer schematischer Darstellung aus Sicht des Betrachters; und
- Fig. 6
- ein weiteres Ausführungsbeispiel einer Leuchte, die nicht Gegenstand der Ansprüche ist, in perspektivischer schematischer Darstellung aus Sicht des Betrachters.
- Fig. 1
- a known optical element in perspective view from the perspective of the lamp of the lamp;
- Fig. 2
- a known lighting arrangement in section;
- Fig. 3
- an embodiment of a lamp, which is not the subject of the claims, in a perspective schematic representation from the view of the viewer;
- Fig. 4
- an optical element in perspective view from the perspective of the lamp of the lamp, which is used in a lamp according to the invention;
- Fig. 5
- an embodiment of the lamp according to the present invention in a perspective schematic representation of the viewer; and
- Fig. 6
- a further embodiment of a lamp, which is not the subject of the claims, in a perspective schematic representation of the viewer.
In
Das erste Ausführungsbeispiel gemäß
Das in oder vor der Abstrahlöffnung 13 angeordnete optische Element 14 dient der Umlenkung von in dieses eintretenden und wieder aus diesem austretenden Lichtstrahlen 15, derart, daß deren Austrittswinkel begrenzt ist, d.h. kleiner als ein vorbestimmter Grenzaustrittswinkel von etwa 60-70° ist. Hierzu weist das optische Element 14 einen plattenförmigen Kern 16 aus transparentem Material, wie zum Beispiel Acrylglas, auf, der an einer Seite mit Mikroprismen 17 besetzt ist, die sich unter Bildung von Furchen 18 - von ihrer Wurzel ausgehend - verjüngen, wobei die Gesamtheit der Mikroprismen-Deckflächen die Lichteintrittsfläche und die andere Seite des Kerns 17 die Lichtaustrittsfläche bildet. Im ersten Ausführungsbeispiel von
Alternativ ist es auch denkbar, das optische Element 12 umgekehrt in die Leuchte 10 einzubauen. In diesem Fall bildet die Gesamtheit der Mikroprismen-Deckflächen die Lichtaustrittsfläche und die andere Seite des Kerns 17 die Lichteintrittsfläche.Alternatively, it is also conceivable to install the
Die Lampen 11 sind seitlich versetzt zu der Abstrahlöffnung 13 bzw. dem optischen Element 14 angeordnet. Weiter ist der Reflektor 12 so in Bezug auf die Lampen 11 angeordnet und geformt, daß die von den Lampen 11 abgestrahlten Lichtstrahlen 15 nicht direkt durch die Abstrahlöffnung 13 abgestrahlt werden, d.h. im wesentlichen nur am Reflektor 12 reflektierte Lichtstrahlen 15 die Abstrahlöffnung 13 durch das optische Element 14 verlassen können. Vorzugsweise ist die Innenseite des Reflektors 12 diffus reflektierend ausgebildet, wie zum Beispiel weiß lackiert oder mit hochreflektierendem Teflon beschichtet.The
Die Konstruktion des optischen Elements 14 mit Mikroprismenstruktur 17 bewirkt in bekannter Weise eine Entblendung der Lichtstrahlen für den Betrachter, d.h. eine Begrenzung des Austrittswinkels der Lichtstrahlen 15 aus der Leuchte 10. Dadurch, daß keiner oder nahezu keine Lichtstrahlen direkt von den Lampen 11 durch das optische Element 14 abgestrahlt werden, sondern im wesentlichen nur an der Innenseite des Reflektors 12 reflektierte Lichtstrahlen 15 in das optische Element 14 einkoppeln und dieses nach unten wieder verlassen, erreicht man eine gleichmäßige oder zumindest nahezu gleichmäßige Ausleuchtung der gesamten Fläche des optischen Elements 14. Dieser Effekt wird durch eine diffus reflektierende Innenseite des Reflektors noch verstärkt.The construction of the microprismatic 17
Anstelle der Verwendung von zwei länglichen Leuchtstoffröhren 11, wie dies in
Anhand der
Beide optischen Elemente 14-1, 14-2 der Leuchte 10 sind gemäß
Ordnet man deshalb zwei derartige optische Elemente 14-1, 14-2 mit Längsstruktur parallel übereinander an, wobei die Erstreckungsrichtung der Mikroprismen 17 des einen optischen Elements 14-1 gegenüber der Erstreckungsrichtung der Mikroprismen 17 des anderen optischen Elements 14-2 um 90° gedreht ist, d.h. die Mikroprismen des ersten optischen Elements 14-1 quer zu den Mikroprismen des zweiten optischen Elements 14-2 verlaufen, so erzielt man den gleichen Effekt wie mit einem einzigen optischen Element 14 mit Kreuzstruktur. Allerdings ist die Herstellung der optischen Elemente 14-1, 14-2 mit Längsstruktur einfacher und damit kostengünstiger als die Herstellung der optischen Elemente 14 mit Kreuzstruktur.Therefore, if two such optical elements 14-1, 14-2 with a longitudinal structure are arranged in parallel one above the other, the extension direction of the
Im Ausführungsbeispiel von
Wie in
Durch eine derartige reflektierende Abdeckung 19 kann der Wirkungsgrad des optischen Elements 14-1, 14-2 weiter erhöht werden. Anstelle der in
Die hier am Beispiel des optischen Elements 14-1, 14-2 von
Anhand von
Eine längliche Lampe 11, beispielsweise eine Leuchtstoffröhre, ist von einem entsprechenden, ebenfalls länglichen Reflektor 12 oder Reflektorgehäuse umgeben. Der Reflektor 12 weist an seiner Unterseite eine Abstrahlöffnung 13 auf, die mit einem optischen Element 14-1 verschlossen ist. Das optische Element 14-1 entspricht der in
Im Gegensatz zu den beiden obigen Ausführungsbeispielen ist hier die Innenseite des Reflektors 12 spiegelnd reflektierend ausgebildet und die Lampe 11 ist nicht seitlich versetzt sondern mittig über dem optischen Element 14-1 angeordnet. Dennoch kann auch in diesem Fall eine gleichmäßige Ausleuchtung des optischen Elements 14-1 und eine Entblendung der Lichtstrahlen, d.h. eine Begrenzung des Austrittswinkels der Lichtstrahlen aus der Leuchte 10 erzielt werden, da die spiegelnd reflektierende Innenseite des Reflektors 12 das Licht quer zur Längsachse der Lampe 11 lenkt und damit in dieser Richtung sowohl für eine Entblendung als auch für eine gleichmäßige Ausleuchtung sorgt, das optische Element 14-1 aufgrund der Längsstruktur der Mikroprismen 17 quer zur Längsachse der Lampe für eine Entblendung parallel zur Längsachse der Lampe sorgt, und eine gleichmäßige Ausleuchtung parallel zur Längsrichtung der Lampe durch die längliche Form der Lampe automatisch gegeben ist.In contrast to the two embodiments above, here the inside of the
Wie im Falle des ersten Ausführungsbeispiels können auch bei den Leuchten 10 gemäß zweiten und dritten Ausführungsbeispiel die optischen Elemente 14-1, 14-2 so in oder vor die Abstrahlöffnung 13 der Leuchte 10 angeordnet werden, daß entweder die Gesamtheit der Mikroprismen-Deckflächen die Lichteintrittsfläche und die andere Seite des Kerns die Lichtaustrittsseite bildet oder umgekehrt.As in the case of the first exemplary embodiment, the optical elements 14-1, 14-2 can also be arranged in or in front of the
Claims (2)
- A luminaire, having at least one lamp (11); a reflector (12) surrounding the lamp (11), the inner side of which reflector towards the lamp is formed to be reflecting and which reflector has an emission opening (13) for emission of the light; and two optical elements (14-1, 14-2), arranged in or in front of the emission opening (13), for deflecting light beams (15) entering into these optical elements and again exiting therefrom, in such a way that the exit angle of the light beams is smaller than a predetermined limit exit angle, wherein the two optical elements (14-1, 14-2) have a plate-like core (16) of transparent material which is occupied on one side with microprisms (17) which have an elongate structure and taper, starting from their roots, with the formation of furrows (18), wherein the two optical element (14-1, 14-2) are arranged parallel to one another, and the microprisms (17) of the one optical element (14-1) extend transversely to the microprisms (17) of the other optical element (14-2),
characterized in that
two lamps (11), elongate and directed parallel to one another, are provided that are arranged laterally outwardly offset with respect to the emission opening (13), and
the reflector (12) is so arranged and shaped with reference to the lamps (11) that in substance only light beams reflected at the reflector (12) can leave the emission opening (13) through the optical elements (14-1, 14-2). - A luminaire according to claim 1,
characterized in that
the furrows (18) between the microprisms (17) of the first and/or the second optical element (14-1, 14-2) are covered over by means of a reflecting material (19) or are filled with a reflecting material in order to prevent penetration of the light beams through the furrows (18) into the microprisms (17).
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19923225 | 1999-05-20 | ||
DE19923225A DE19923225B4 (en) | 1999-05-20 | 1999-05-20 | Optical element for deflecting light rays and manufacturing processes |
DE29909282U DE29909282U1 (en) | 1999-05-20 | 1999-05-27 | lamp |
DE29909282U | 1999-05-27 | ||
EP00929391A EP1179158B1 (en) | 1999-05-20 | 2000-04-19 | Light |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00929391A Division EP1179158B1 (en) | 1999-05-20 | 2000-04-19 | Light |
Publications (3)
Publication Number | Publication Date |
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EP1338845A2 EP1338845A2 (en) | 2003-08-27 |
EP1338845A3 EP1338845A3 (en) | 2007-01-17 |
EP1338845B1 true EP1338845B1 (en) | 2009-08-19 |
Family
ID=26053450
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP00929391A Expired - Lifetime EP1179158B1 (en) | 1999-05-20 | 2000-04-19 | Light |
EP03007163A Expired - Lifetime EP1338845B1 (en) | 1999-05-20 | 2000-04-19 | Lamp |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00929391A Expired - Lifetime EP1179158B1 (en) | 1999-05-20 | 2000-04-19 | Light |
Country Status (12)
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---|---|
US (1) | US6945670B2 (en) |
EP (2) | EP1179158B1 (en) |
JP (1) | JP2003500813A (en) |
AT (1) | ATE244852T1 (en) |
AU (1) | AU765828B2 (en) |
CA (1) | CA2374023C (en) |
DK (1) | DK1179158T3 (en) |
ES (1) | ES2202127T3 (en) |
NO (1) | NO20015632L (en) |
NZ (1) | NZ515195A (en) |
PT (1) | PT1179158E (en) |
WO (1) | WO2000071927A1 (en) |
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DE10315268A1 (en) * | 2003-04-03 | 2004-10-14 | Zumtobel Staff Gmbh | Light influencing element |
EP1734300B2 (en) | 2005-06-13 | 2013-11-20 | Hartmut S. Engel | Indoor lamp |
KR100829015B1 (en) * | 2006-08-22 | 2008-05-14 | 엘지전자 주식회사 | Surface light source, back light unit and liquid crystal display having the same |
US8262253B2 (en) * | 2007-05-02 | 2012-09-11 | Luminator Holding Lp | Lighting method and system |
WO2009067844A1 (en) * | 2007-11-28 | 2009-06-04 | Chihua Shieh | A light emitting diode illuminator |
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CA2738315C (en) | 2008-09-24 | 2017-01-03 | Luminator Holding Lp | Methods and systems for maintaining the illumination intensity of light emitting diodes |
JP2016530668A (en) * | 2013-09-24 | 2016-09-29 | フィリップス ライティング ホールディング ビー ヴィ | Lighting unit |
US20170023211A1 (en) * | 2013-12-16 | 2017-01-26 | Philips Lighting Holding B.V. | Flexible unobstructed beam shaping |
CN104033766A (en) * | 2014-06-16 | 2014-09-10 | 顾钰锋 | Flicker-free illuminating lamp |
US10222029B2 (en) * | 2014-09-30 | 2019-03-05 | The Boeing Company | Array-based lighting systems and methods of manufacturing |
US10955108B2 (en) * | 2016-06-28 | 2021-03-23 | Opple Lighting Co., Ltd. | Ceiling lamp |
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JPS5935302A (en) * | 1982-08-23 | 1984-02-27 | 東芝テック株式会社 | Illuminator |
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-
2000
- 2000-04-19 ES ES00929391T patent/ES2202127T3/en not_active Expired - Lifetime
- 2000-04-19 AU AU47497/00A patent/AU765828B2/en not_active Ceased
- 2000-04-19 EP EP00929391A patent/EP1179158B1/en not_active Expired - Lifetime
- 2000-04-19 AT AT00929391T patent/ATE244852T1/en active
- 2000-04-19 CA CA002374023A patent/CA2374023C/en not_active Expired - Fee Related
- 2000-04-19 EP EP03007163A patent/EP1338845B1/en not_active Expired - Lifetime
- 2000-04-19 NZ NZ515195A patent/NZ515195A/en not_active IP Right Cessation
- 2000-04-19 DK DK00929391T patent/DK1179158T3/en active
- 2000-04-19 PT PT00929391T patent/PT1179158E/en unknown
- 2000-04-19 WO PCT/EP2000/003571 patent/WO2000071927A1/en active IP Right Grant
- 2000-04-19 JP JP2000620277A patent/JP2003500813A/en active Pending
-
2001
- 2001-11-19 NO NO20015632A patent/NO20015632L/en not_active Application Discontinuation
- 2001-11-20 US US09/988,464 patent/US6945670B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2202127T3 (en) | 2004-04-01 |
US6945670B2 (en) | 2005-09-20 |
WO2000071927A1 (en) | 2000-11-30 |
CA2374023C (en) | 2009-06-30 |
NZ515195A (en) | 2003-04-29 |
EP1179158B1 (en) | 2003-07-09 |
ATE244852T1 (en) | 2003-07-15 |
DK1179158T3 (en) | 2003-08-04 |
AU4749700A (en) | 2000-12-12 |
EP1338845A3 (en) | 2007-01-17 |
EP1179158A1 (en) | 2002-02-13 |
PT1179158E (en) | 2003-09-30 |
NO20015632D0 (en) | 2001-11-19 |
NO20015632L (en) | 2001-11-19 |
EP1338845A2 (en) | 2003-08-27 |
CA2374023A1 (en) | 2000-11-30 |
AU765828B2 (en) | 2003-10-02 |
US20020048168A1 (en) | 2002-04-25 |
JP2003500813A (en) | 2003-01-07 |
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